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//===-- X86MCAsmInfo.cpp - X86 asm properties -----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the declarations of the X86MCAsmInfo properties.
//
//===----------------------------------------------------------------------===//
#include "X86MCAsmInfo.h"
#include "X86TargetMachine.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
enum AsmWriterFlavorTy {
// Note: This numbering has to match the GCC assembler dialects for inline
// asm alternatives to work right.
ATT = 0, Intel = 1
};
static cl::opt<AsmWriterFlavorTy>
AsmWriterFlavor("x86-asm-syntax", cl::init(ATT),
cl::desc("Choose style of code to emit from X86 backend:"),
cl::values(clEnumValN(ATT, "att", "Emit AT&T-style assembly"),
clEnumValN(Intel, "intel", "Emit Intel-style assembly"),
clEnumValEnd));
static const char *const x86_asm_table[] = {
"{si}", "S",
"{di}", "D",
"{ax}", "a",
"{cx}", "c",
"{memory}", "memory",
"{flags}", "",
"{dirflag}", "",
"{fpsr}", "",
"{cc}", "cc",
0,0};
X86DarwinMCAsmInfo::X86DarwinMCAsmInfo(const Triple &Triple) {
AsmTransCBE = x86_asm_table;
AssemblerDialect = AsmWriterFlavor;
bool is64Bit = Triple.getArch() == Triple::x86_64;
TextAlignFillValue = 0x90;
if (!is64Bit)
Data64bitsDirective = 0; // we can't emit a 64-bit unit
// Leopard and above support aligned common symbols.
COMMDirectiveTakesAlignment = Triple.getDarwinMajorNumber() >= 9;
if (is64Bit) {
PersonalityPrefix = "";
PersonalitySuffix = "+4@GOTPCREL";
} else {
PersonalityPrefix = "L";
PersonalitySuffix = "$non_lazy_ptr";
}
CommentString = "##";
PCSymbol = ".";
SupportsDebugInformation = true;
DwarfUsesInlineInfoSection = true;
// Exceptions handling
ExceptionsType = ExceptionHandling::Dwarf;
AbsoluteEHSectionOffsets = false;
}
X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &Triple) {
AsmTransCBE = x86_asm_table;
AssemblerDialect = AsmWriterFlavor;
PrivateGlobalPrefix = ".L";
WeakRefDirective = "\t.weak\t";
SetDirective = "\t.set\t";
PCSymbol = ".";
// Set up DWARF directives
HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
// Debug Information
AbsoluteDebugSectionOffsets = true;
SupportsDebugInformation = true;
// Exceptions handling
ExceptionsType = ExceptionHandling::Dwarf;
AbsoluteEHSectionOffsets = false;
// On Linux we must declare when we can use a non-executable stack.
if (Triple.getOS() == Triple::Linux)
NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
}
X86COFFMCAsmInfo::X86COFFMCAsmInfo(const Triple &Triple) {
AsmTransCBE = x86_asm_table;
AssemblerDialect = AsmWriterFlavor;
}
X86WinMCAsmInfo::X86WinMCAsmInfo(const Triple &Triple) {
AsmTransCBE = x86_asm_table;
AssemblerDialect = AsmWriterFlavor;
GlobalPrefix = "_";
CommentString = ";";
PrivateGlobalPrefix = "$";
AlignDirective = "\tALIGN\t";
ZeroDirective = "\tdb\t";
ZeroDirectiveSuffix = " dup(0)";
AsciiDirective = "\tdb\t";
AscizDirective = 0;
Data8bitsDirective = "\tdb\t";
Data16bitsDirective = "\tdw\t";
Data32bitsDirective = "\tdd\t";
Data64bitsDirective = "\tdq\t";
HasDotTypeDotSizeDirective = false;
HasSingleParameterDotFile = false;
AlignmentIsInBytes = true;
}
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